Mitsubishi Lancer (4A9 engine). Manual — part 219
ETACS
CHASSIS ELECTRICAL
54A-538
STEP 7. M.U.T.-III data list
Check the power supply fuse voltage.
• Ignition switch: OFF
OK: Normal condition is displayed.
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Replace the ETACS-ECU.
STEP 8. Check whether the diagnosis code is
reset.
Check again if the diagnosis code is set to the
ETACS-ECU.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from "LOCK" (OFF)
position to "ON" position.
(3) Check if diagnosis code is set.
Q: Is the diagnosis code set?
YES :
Replace the ETACS-ECU.
NO :
The trouble can be an intermittent
malfunction (GROUP 00
− How to use
Troubleshooting/Inspection Service Points
−
How to Cope with Intermittent Malfunction ).
Code No.B2206 Chassis No. mismatch
CAUTION
If the diagnosis code No. B2206 is set, always
diagnose the CAN bus line.
DIAGNOSTIC FUNCTION
If the registered chassis number is different from the
chassis number transmitted on the CAN bus lines,
the ETACS-ECU sets the diagnosis code No. B2206.
JUDGEMENT CRITERIA
If the chassis number registered to ETACS-ECU and
the chassis number on CAN bus lines do not match,
the ETACS-ECU determines that a problem has
occurred.
PROBABLE CAUSES
• Chassis number not written
• Malfunction of the ETACS-ECU
• Malfunction of engine ECU
• Malfunction of CAN bus line
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the CAN bus line (Refer to GROUP
54C
− Troubleshooting ). On completion, go
to Step 3.
STEP 2. M.U.T.-III other system diagnosis code
Check if diagnosis code is set to the engine-ECU.
Q: Is the diagnosis code set?
YES :
Troubleshoot the engine (Refer to GROUP
13A
− Troubleshooting <1600> or GROUP
13B
− Troubleshooting <1800-PETROL-
DOHC, 2000> or GROUP 13C
−
Troubleshooting <DIESEL> or GROUP 13F
− Troubleshooting <1800-SOHC>).
NO :
Go to Step 3.
STEP 3. Check whether the diagnosis code is
reset.
Check again if the diagnosis code is set to the
ETACS-ECU.
(1) Write the chassis number to the ETACS-ECU.
(2) Erase the diagnosis code.
(3) Turn the ignition switch from "LOCK" (OFF)
position to "ON" position.
(4) Check if diagnosis code is set.
Q: Is the diagnosis code set?
YES :
Replace with the coded ETACS-ECU.
NO :
The diagnosis is complete.
Item No.
Item name
Normal
condition
Item 253
Voltage sensing
of IOD Line
System voltage
ETACS
CHASSIS ELECTRICAL
54A-539
Code No.B2215 ECU internal error
JUDGMENT CRITERIA
When the ETACS-ECU internal error count reaches
"255," the diagnosis code No. B2215 is set.
PROBABLE CAUSES
• Malfunction of the ETACS-ECU
DIAGNOSIS PROCEDURE
Replace the ETACS-ECU.
Code No.B222C Coding not completed
JUDGMENT CRITERIA
If the ETACS-ECU is in the initial state or the variant
coding is incomplete, the ETACS-ECU sets the diag-
nosis code No. B222C.
PROBABLE CAUSES
• Variant code not written
• Malfunction of the ETACS-ECU
DIAGNOSIS PROCEDURE
M.U.T.-III diagnosis code
Check again if the diagnosis code is set to the
ETACS-ECU.
(1) Perform the variant coding to the ETACS-ECU.
(2) Erase the diagnosis code.
(3) Turn the ignition switch from "LOCK" (OFF)
position to "ON" position.
(4) Check if diagnosis code is set.
Q: Is the diagnosis code set?
YES :
Replace with the coded ETACS-ECU.
NO :
The diagnosis is complete.
ETACS
CHASSIS ELECTRICAL
54A-540
Code No.B2353 Ignition power supply (low input)
Code No.B2354 Ignition power supply (high input)
CAUTION
Before replacing the ECU, ensure that the input and output signal circuits are normal.
TROUBLE JUDGEMENT
These diagnosis codes are set when the IG voltage
decreases to the specified value or less (code No.
B2353) or increases to the specified value or more
(code No. B2354). However, when the status returns
to normal, the code Nos. B2353 and B2354 are auto-
matically erased.
ETACS-ECU Power Source Circuit
ETACS-ECU
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet PU : Purple SI : Silver
FUSIBLE
LINK
34
44
FUSIBLE
LINK
36
38
RELAY BOX
ENGINE
COMPARTMENT
NOTE
PETROL
:
DIESEL
:
AC701240
AO
Connector: C-317 <LHD>
ETACS-ECU
AC701241
AC
Connector: C-317 <RHD>
ETACS-ECU
ETACS
CHASSIS ELECTRICAL
54A-541
COMMENTS ON TROUBLE SYMPTOM
The power supply circuit or the ETACS-ECU may
have a problem.
PROBABLE CAUSES
• Malfunction of power supply circuit
• Malfunction of battery
• Malfunction of alternator
• Malfunction of harness
• Malfunction of the ignition switch
• Malfunction of the ETACS-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III data list
Check the IG voltage.
• Turn the ignition switch to the ON position.
OK: Normal condition is displayed.
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Go to Step 2.
STEP 2. Battery check
Refer to GROUP 54A
− Battery Test .
Q: Is the battery in good condition?
YES :
Go to Step 3.
NO :
Charge or replace the battery.
STEP 3. Charging system check
Refer to GROUP 16
− Charging System .
Q: Is the charging system in good condition?
YES :
Go to Step 4.
NO :
Repair or replace the charging system
component(s).
STEP 4. Connector check: C-317 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Repair the defective connector.
STEP 5. Voltage measurement at the C-317
ETACS-ECU connector.
(1) Measure by backprobing without disconnecting
the connector.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between the C-317 ETACS-
ECU connector terminal No. 6 and the body
earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Go to Step 6.
STEP 6. Wiring harness check between the C-317
ETACS-ECU connector terminal No. 6 and the
ignition switch (IG1)
Check the power supply line for open circuit and
short circuit.
Q: Is the check result normal?
YES :
Refer to Inspection Procedure 2
"Malfunction of the ignition switch power
supply system."
NO :
Repair the wiring harness.
STEP 7. Check whether the diagnosis code is
reset.
Check again if the diagnosis code is set to the
ETACS-ECU.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from "LOCK" (OFF)
position to "ON" position.
(3) Check if diagnosis code is set.
Q: Is the diagnosis code set?
YES :
Replace the ETACS-ECU.
NO :
The trouble can be an intermittent
malfunction (GROUP 00
− How to use
Troubleshooting/Inspection Service Points
−
How to Cope with Intermittent Malfunction ).
DATA LIST REFERENCE TABLE
M1545001300624
NOTE: Some items are not displayed on M.U.T.-III
according to the information in the ECU.
Item No.
Item name
Normal
condition
Item 254
IG voltage
System voltage
Item No. M.U.T.-III display
Check condition
Normal condition
1
CAN-H voltage (CAN-C)
−
2.0
−4.5 V
2
CAN-L voltage (CAN-C)
−
0.5
−3.0 V
200
Original VIN writing status
When writing status is normal
Comp/Unperformed
or Comp and locked
When writing status is abnormal ECU internal Err
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